3 Leitz Ultrapak objectives
Date1935-1945
Inventory Number2003-1-0006
ClassificationMicroscope Optics
Subject
Maker
Ernst Leitz (company)
1849 - 1986
User
Farlow Herbarium
founded 1919
Cultural Region
Place of Origin
Dimensions8 x 20 x 19 cm (3 1/8 x 7 7/8 x 7 1/2 in.)
Material
Bibliography
DescriptionThis is a set of Leitz Ultropak microscope objectives. There are a total of three objectives stored in orange cardboard boxes with wooden mounts.
The objectives are marked 11, 22, and 100 oel. The latter two have caps marked 22-100.
The objectives are epi objectives with a coaxially surrounding illumination system. The illumination system is separately focusable with respect to the objective. It forms a condenser out of a first lens with a central hole for the objective followed by another, smaller lens immediately surrounding the tip of the objective. In the low power (11x) objective the second lens is larger and closer to the first one. A special microscope tube is needed containing a 45 degree mirror for the illumination and a central hole for the imaging optical train.
The objectives are marked 11, 22, and 100 oel. The latter two have caps marked 22-100.
The objectives are epi objectives with a coaxially surrounding illumination system. The illumination system is separately focusable with respect to the objective. It forms a condenser out of a first lens with a central hole for the objective followed by another, smaller lens immediately surrounding the tip of the objective. In the low power (11x) objective the second lens is larger and closer to the first one. A special microscope tube is needed containing a 45 degree mirror for the illumination and a central hole for the imaging optical train.
Signedon objectives: Ernst Leitz Wetzlar
on objectives: Germany
Curatorial RemarksThe unusually simple but neatly made cardboard/wood boxes for these expensive objectives are surprising. They may indicate a date not long after 1945 when there was a shortage of everything in Germany and a desperate need for export earnings.
ProvenanceFarlow Herbarium, Harvard University, Cambridge, MA
Historical AttributesThis instrument was used in the Farlow Herbarium, Harvard University, Cambridge, MA.
Ernst Leitz (company)
Date: circa 1937
Accessories: standard eyepieces (3): 8X P, Periplan. OK 10X, and Periplan. Ok. 25X; wide eyepieces (3): 1, 1, 8X, 10X; objectives (4) in fitted case: 1b 4.3X, 3 10X, P7 62X, P 1/12 oel; waveplates (2); condenser with polarizer; mechanical stage; loupe 6x; box of cover glasses; standing case; key; objective adaptors (4); and watch keys (2)
Object number: 1999-1-0020a
Carl Zeiss, Optische Werkstätte, Jena
Date: circa 1902
Accessories: oculars (5); objectives (5); microplanar objectives (2); iris diaphragm; abbe condenser; collars and sleeves for photography; parts box; Leitz object micrometer (1308b); cardioid condenser (1308d); immersion oil bottle (1308c) ; Leitz erecting prism (1308e); standing case with key
Object number: 1308a
Robert B. Tolles
Date: 1860-1874
Object number: 1045a-v
Ernst Leitz (company)
Date: 1935-1940
Accessories: oculars (3 pairs): 4X, 5XB, 6XB; objective/condensers (4): 11, 3.8X, 22-100, and UO 6.5; magnification table; standing case.
Object number: 2009-1-0065
Boston Optical Works
Date: circa 1870
Accessories: 3 Tolles objectives: 1 with 3 fronts; empty can 8/10; 5 Tolles oculars 34 mm dia.: 2 all solid, 2 solid field l. & single eye lens, 1 std.; blue filter; case; key. Also see 1016a: microscope with centerable condenser with diaphragm wheel; and mechanical stage. 1016c: side illumination prism. 1016d, e, f: specialized Tolles objectives.
Object number: 1016b
R. & J. Beck
Date: 1876
Accessories: Beck patent substage condenser (1122c); apertometer (1122d)
Object number: 1122b
Ernst Leitz (company)
Date: circa 1930
Accessories: Leitz objectives on special mountings (3): p14 mm/ 3b, 3.2x/1, 6a ohne Deckglas Tubusl. 215 mm; small wrenches (5); polarizer; spare beamsplitter glasses; case
Object number: 1999-1-0020f
Boston Optical Works
Date: 1879
Object number: 1016d
Bausch & Lomb Optical Company
Date: circa 1949
Accessories: B & L objectives (2): 32 mm, 48 mm; ocular 10x; objective can in cardboard box
Object number: 1997-1-0313
Carl Zeiss Jena
Date: circa 1910
Object number: 1991-1-0004
Bausch & Lomb Optical Company
Date: 1876-1890
Accessories: objectives (2): Spencer, 44x 4 mm n.a. O.85; B&L 1/5
Object number: 2002-1-0057